Design of Combustion Chamber for Dual Fuel Engine

YANG Zhou; WANG Zhongshu; LIU Qiang; LI Mingyue1; DING Yunlong

doi:10.3969/j.issn.1001-2222.2018.06.012

Vehicle Engine ›› 2018, Vol. 0 ›› Issue (6) : 71. DOI: 10.3969/j.issn.1001-2222.2018.06.012

Design of Combustion Chamber for Dual Fuel Engine

YANG Zhou¹,WANG Zhongshu^,LIU Qiang¹,LI Mingyue¹,DING Yunlong³

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Abstract

Based on the common issues of dieselnatural gas dual fuel engine existing in the key technologies and the phenomena of low thermal efficiency and high CH₄ emission, the fuel economy improved and the CH₄ emission reduced through strengthening the incylinder turbulent flow and improving the mixture combustion in terms of combustion chamber optimization. The numerical simulation platform was established with STAR-CD software and its verification was conducted. Then a new type of combustion chamber was designed to improve the incylinder flow and combustion rate through analyzing the changes of microscopic combustion parameters in the original configuration under the load conditions of 218 N·m at 1 335 r/min. The results show that the new combustion chamber can effectively strengthen the in-cylinder turbulent flow and hence the maximum combustion pressure increases by nearly 25% and the natural gas residual rate decreases from 28.6% to 0.5%. Finally, the optimal combustion quality is determined and the economy and emissions improve.

Key words

dual fuel engine / diesel / natural gas / combustion chamber / numerical simulation / turbulent flow

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YANG Zhou,WANG Zhongshu,LIU Qiang,LI Mingyue1,DING Yunlong. Design of Combustion Chamber for Dual Fuel Engine[J]. Vehicle Engine. 2018, 0(6): 71 https://doi.org/10.3969/j.issn.1001-2222.2018.06.012